The Battery

The battery is the primary "source" of electrical energy on Toyota vehicles when the engine is not running or is being started. It uses an electrochemical reaction to change chemical energy into electrical energy for starting, ignition, charging, lighting, and accessories.

All Toyota vehicles use a 12-volt battery. Batteries have polarity markings ... the larger (thicker)

terminal is marked "plus" or "POS" (+), the other terminal is marked "minus" or "NEG" (-). Correct polarity is important; components can be damaged if the battery is connected backwards.

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.